a) (48 + 13) ´ 4 – 279 : 9 = .................................................... = .................................................... = .................................................... c) 867 – 24 ´ 2 – 621 : 9 = .................................................... = .................................................... = .................................................... | b) 832 – 816 : 8 ´ (24 : 8) = .................................................... = .................................................... = .................................................... d) (596 – 496) ´ 9 + 2 ´ (456 : 4) = .................................................... = .................................................... = .................................................... |